Maybe it's the alcohol?

[central scrutinizer]

People should say when they are going afk, it's a very simple courtesy. SO I don't completely disagree with your post.

Personally I just would have just asked him to please announce afk's in the future, and left it at that, refusing to group with him again seems to be a bit much.

Also if you're already drinking and somebody starts bragging about their fake elf that exists on a drive somewhere, just inform people that you're too drunk to do shots every time that they mention their main.
Or let them know that you're in a relationship and can't drive to their house to blow them whenever they mention their pixels and please just stop, it's making your heart ache terribly but the world that you want and the world that you live in can often be two very different places.